package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.apis.article.IAritcleClient;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.constants.WmNewsMessageConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.NewsAuthDto;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.*;
import com.heima.model.wemedia.vo.WmNewsVo;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.*;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import com.heima.wemedia.service.WmUserService;
import io.seata.spring.annotation.GlobalTransactional;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;
import java.util.stream.Collectors;

/**
 * @author 谢金成
 * @date 2024/4/10 14:41
 */
@Service
@Transactional
@Slf4j
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {

    /**
     * 条件查询文章列表
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmNewsPageReqDto dto) {

        // 1.检测参数
        // 分页检查
        dto.checkParam();

        // 2.条件查询
        IPage page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = new LambdaQueryWrapper<>();

        // 状态精确查询
        if (dto.getStatus() != null) {
            lambdaQueryWrapper.eq(WmNews::getStatus, dto.getStatus());
        }
        // 频道精确查询
        if (dto.getChannelId() != null) {
            lambdaQueryWrapper.eq(WmNews::getChannelId, dto.getChannelId());
        }
        // 时间范围查询
        if (dto.getBeginPubDate() != null && dto.getEndPubDate() != null) {
            lambdaQueryWrapper.between(WmNews::getPublishTime, dto.getBeginPubDate(), dto.getEndPubDate());
        }
        // 关键字模糊查询
        if (StringUtils.isNotBlank(dto.getKeyword())) {
            lambdaQueryWrapper.like(WmNews::getTitle, dto.getKeyword());
        }
        // 查询当前登入人的文章
        lambdaQueryWrapper.eq(WmNews::getUserId, WmThreadLocalUtil.getUser().getId());
        // 按照发布时间倒序排序
        lambdaQueryWrapper.orderByDesc(WmNews::getPublishTime);

        page = page(page, lambdaQueryWrapper);

        // 3.结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int) page.getTotal());
        responseResult.setData(page.getRecords());

        return responseResult;
    }

    @Autowired
    private WmNewsAutoScanService wmNewsAutoScanService;

    @Autowired
    private WmNewsTaskService wmNewsTaskService;

    /**
     * 发布修改文章或保存为草稿
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult submitNews(WmNewsDto dto) {
        // 条件判断
        if (dto == null || dto.getContent() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        // 1.保存或修改文章
        WmNews wmNews = new WmNews();
        BeanUtils.copyProperties(dto, wmNews);
        // 封面图片
        if (dto.getImages() != null && dto.getImages().size() > 0) {
            String imageStr = StringUtils.join(dto.getImages(), ",");
            wmNews.setImages(imageStr);
        }
        // 如果当前封面类型为自动
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            wmNews.setType(null);
        }


        saveOrUpdateWmNews(wmNews);

        // 2.判断是否为草稿
        if (dto.getStatus().equals(WmNews.Status.NORMAL.getCode())) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }

        // 3.不是草稿, 保存文章内容图片与素材的关系
        // 获取文章内容中的图片
        List<String> materials = ectractUrlInfo(dto.getContent());
        saveRelativeInfoForContent(materials, wmNews.getId());

        // 4.不是草稿, 保存文章封面图片与素材的关系, 如果当前的布局是自动的, 需要匹配封面图片
        saveRelativeInfoForCover(dto, wmNews, materials);

        // 审核文章
        //wmNewsAutoScanService.autoScanWmNews(wmNews.getId());
        wmNewsTaskService.addNewsToTask(wmNews.getId(), wmNews.getPublishTime());

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 第一个功能: 如果当前封面类型是自动的, 则设置封面类型的数据
     * 匹配规则:
     * 1.如果内容图片大于等于1, 小于3,  type 1
     * 2.如果内容图片大于等于3, type 3
     * 3.如果内容没有图片, type 0
     * <p>
     * 第二个功能: 保存封面图片与素材的关系
     *
     * @param dto
     * @param wmNews
     * @param materials
     */
    private void saveRelativeInfoForCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();

        // 如果当前封面类型是自动的, 则设置封面类型的数据
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)) {
            if (materials.size() >= 3) {
                // 多图
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAEG);
                images = materials.stream().limit(3).collect(Collectors.toList());
            } else if (materials.size() >= 1) {
                // 单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());
            } else {
                // 无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAEG);
            }

            // 修改文章
            if (images != null && images.size() > 0) {
                wmNews.setImages(StringUtils.join(images, ","));
            }
            updateById(wmNews);
        }

        // 保存封面图片与素材的关系
        if (images != null && images.size() > 0) {
            saveRelativeInfo(images, wmNews.getId(), WemediaConstants.WM_COVER_REFERENCE);
        }
    }

    /**
     * 处理文章内容图片与素材的关系
     *
     * @param materials
     * @param newsId
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer newsId) {
        saveRelativeInfo(materials, newsId, WemediaConstants.WM_CONTENT_REFERENCE);
    }

    @Autowired
    private WmMaterialMapper wmMaterialMapper;

    /**
     * 保存文章图片与素材的关系
     *
     * @param materials
     * @param newsId
     * @param type
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        if (materials != null && !materials.isEmpty()) {
            // 通过图片的url查询素材id
            List<WmMaterial> dbMaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));
            // 判断素材是否有效
            if (dbMaterials == null || dbMaterials.size() == 0) {
                // 手动抛出异常 第一个功能, 提示调用者素材失效了, 第二个功能, 执行数据回滚
                throw new CustomException(AppHttpCodeEnum.MATERIAL_REFERENCE_FAIL);
            }

            if (materials.size() != dbMaterials.size()) {
                throw new CustomException(AppHttpCodeEnum.MATERIAL_REFERENCE_FAIL);
            }
            List<Integer> idList = dbMaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());
            // 批量保存
            wmNewsMaterialMapper.saveRelations(idList, newsId, type);
        }
    }

    /**
     * 提取文章内容中图片信息
     *
     * @param content
     * @return
     */
    private List<String> ectractUrlInfo(String content) {
        List<String> materials = new ArrayList<>();
        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps) {
            if (map.get("type").equals("image")) {
                String imgUrl = (String) map.get("value");
                materials.add(imgUrl);
            }
        }

        return materials;
    }

    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;

    /**
     * 保存或修改文章
     *
     * @param wmNews
     */
    private void saveOrUpdateWmNews(WmNews wmNews) {
        // 补全属性
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable((short) 1); // 默认上架

        if (wmNews.getId() == null) {
            // 保存
            save(wmNews);
        } else {
            // 修改
            // 删除文章图片与素材的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId, wmNews.getId()));
            updateById(wmNews);
        }
    }

    @Autowired
    private KafkaTemplate<String, String> kafkaTemplate;

    /**
     * 文章上下架
     * @param dto
     * @return
     */
    @Override
    @GlobalTransactional
    public ResponseResult downOrUp(WmNewsDto dto) {
        // 1.检查参数
        if (dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        // 2.查询文章
        WmNews wmNews = getById(dto.getId());
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 3.判断文章是否已发布
        if (!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID, "当前文章不是发布状态, 不能上下架");
        }
        // 4.修改文章enable
        if (dto.getEnable() != null && dto.getEnable() > -1 && dto.getEnable() < 2) {
            update(Wrappers.<WmNews>lambdaUpdate().set(WmNews::getEnable, dto.getEnable())
                    .eq(WmNews::getId, wmNews.getId()));

            if (wmNews.getArticleId() != null) {
                // 发送消息, 通知article修改文章配置
                Map<String, Object> map = new HashMap<>();
                map.put("articleId", wmNews.getArticleId());
                map.put("enable", dto.getEnable());
                kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC, JSON.toJSONString(map));
            }
        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    @Autowired
    private WmUserService wmUserService;

    @Override
    public ResponseResult findListVo(NewsAuthDto dto) {
        // 1.参数校验
        dto.checkParam();
        // 2.分页查询
        IPage<WmNews> page = new Page<>(dto.getPage(), dto.getSize());
        // 2.1 按照标题模糊查询, 状态精确查询, 创建时间倒序查询
        page = page(page, Wrappers.<WmNews>lambdaQuery()
                .like(StringUtils.isNotBlank(dto.getTitle()), WmNews::getTitle, dto.getTitle())
                .eq(dto.getStatus() != null, WmNews::getStatus, dto.getStatus())
                .orderByDesc(WmNews::getCreatedTime));
        // 3.结果封装
        PageResponseResult pageResponseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int) page.getTotal());
        List<WmNews> wmNewsList = page.getRecords();

        List<WmNewsVo> newsAuthVoList = wmNewsList.stream().map(wmNews -> {
            Integer userId = wmNews.getUserId();
            WmNewsVo newsAuthVo = new WmNewsVo();
            WmUser wmUser = wmUserService.getById(userId);
            BeanUtils.copyProperties(wmNews, newsAuthVo);
            newsAuthVo.setAuthorName(wmUser.getName());
            return newsAuthVo;
        }).collect(Collectors.toList());

        pageResponseResult.setData(newsAuthVoList);

        // 4.返回结果
        return pageResponseResult;
    }

    /**
     * 查询文章详情
     * @param id
     * @return
     */
    @Override
    public ResponseResult findOneVo(Integer id) {
        // 1.校验参数
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        // 2.查询文章
        WmNews wmNews = getById(id);

        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }

        // 3.封装结果
        WmUser wmUser = wmUserService.getById(wmNews.getUserId());
        WmNewsVo newsAuthVo = new WmNewsVo();
        BeanUtils.copyProperties(wmNews, newsAuthVo);
        newsAuthVo.setAuthorName(wmUser.getName());

        // 4.返回结果
        return ResponseResult.okResult(newsAuthVo);
    }

    /**
     * 文章审核失败
     * @param dto
     * @return
     */
    @Override
    public ResponseResult authFail(NewsAuthDto dto) {
        // 1.检查参数
        if (dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        // 2.查询文章
        WmNews wmNews = getById(dto.getId());
        // 文章不存在
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 3.修改数据
        wmNews.setReason(dto.getMsg());
        wmNews.setStatus(WmNews.Status.FAIL.getCode());

        boolean result = updateById(wmNews);

        if (!result) {
            return ResponseResult.errorResult(AppHttpCodeEnum.SERVER_ERROR, "驳回失败");
        }

        // 4.返回结果
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 文章审核通过
     * @param dto
     * @return
     */
    @Override
    @GlobalTransactional
    public ResponseResult authPass(NewsAuthDto dto) {
        // 1.校验参数
        if (dto.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        // 2.查询文章
        WmNews wmNews = getById(dto.getId());
        // 文章不存在
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 3.修改文章
        wmNews.setStatus(WmNews.Status.ADMIN_SUCCESS.getCode());
        if(org.apache.commons.lang3.StringUtils.isNotBlank(dto.getMsg())){
            wmNews.setReason(dto.getMsg());
        }

        updateById(wmNews);

        //审核成功，则需要创建app端文章数据，并修改自媒体文章
        if(wmNews.getStatus().equals(WmNews.Status.ADMIN_SUCCESS)){
            //创建app端文章数据
            ResponseResult responseResult = wmNewsAutoScanService.saveAppArticle(wmNews);
            if(responseResult.getCode().equals(200)){
                wmNews.setArticleId((Long) responseResult.getData());
                wmNews.setStatus(WmNews.Status.PUBLISHED.getCode());
                updateById(wmNews);
            }
        }

        // 5.结果返回
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
